.home {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	.home-bg {
		width: 70%;
		margin-bottom: 20px;
	}
}
.el-row {
	margin-bottom: 20px;
}
.el-row:last-child {
	margin-bottom: 0;
}
.el-col {
	background-color: tomato;
	border: blue 4px;
}
.grid-content {
	min-height: 36px;
	border-radius: 4px;
}
* {
	padding: 0;
	margin: 0;
}
body {
	background-color: #55666d;
	background-repeat: no-repeat;
	background-size: cover;
}
ul {
	list-style: none;
}
.wrapper {
	width: 100%;
	margin: 0 auto;
	border-radius: 20px;
}

/************************  header  ************************/
header.wrapper {
	height: 80px;
	margin-bottom: 20px;
	background-color: #333333;
	box-shadow: 3px 5px 10px #222222;
}
header h1 {
	font-size: 38px !important;
	font-weight: 400;
	line-height: 80px;
	color: #ffffff;
	text-align: center;
	letter-spacing: 5px;
}

/************************  introduce  ************************/
section.introduce {
	height: 350px;
	margin-top: 20px;
	margin-bottom: 20px;
	background-color: #414e53;
	border-radius: 30px;
	box-shadow: 3px 5px 10px #222222;
}
.introduce > ul {
	display: flex;
	justify-content: space-around;
	padding: 20px;
}
.introduce > ul > li {
	position: relative;
	z-index: 0;
	width: 280px;
	height: 280px;
	padding: 10px 15px;
	margin-left: 20px;
	overflow: hidden;
	color: oldlace;
	background-color: #333333;
	border-radius: 20px;
	box-shadow: 3px 5px 10px #222222 inset;
	&:first-child {
		margin-left: 0;
	}
	&:hover div {
		display: block;
		margin-top: 0;
	}
	img {
		z-index: -1;
		width: 100%;
		height: 50%;
		transform: translate(0, 50%);
	}
	h3 {
		margin-top: 10px;
		text-align: center;
	}
	p {
		font-size: 15px;
	}
}
.introduce > ul > li div {
	position: absolute;
	top: 0;
	left: 0;
	box-sizing: border-box;
	width: 100%;
	height: 100%;
	padding: 20px;
	margin-top: -361px; /* 360 + 1 px 其中1px 是为了让 消除白边 */
	background-image: linear-gradient(transparent 20%, rgb(255 255 255 / 15%) 100%);
	border-radius: 20px;
	transition: all 0.5s;
}
